Waste-burning furnace



July 24, 1923. 1,462,721)

C. REES WASTE BURNING FURNACE Filed Oct; 12. 1921 WITNESS INVENTOR Jug, ATTORNEYS Patented July 24, 1923.

U it l t iii; are a CLAUDE BEES, OF SAN FRANCISCO, CALIFORNIA.

WASTE- BURNING FURNACE.

To all-whom it may concern: h Be it known that 1, CLAUDE a citizen of the United States, and a resident of the city and county of San Francisco, State of California, have invented a new and useful Waste-Burning Furnace, of which the following is a specification.

This invention relates to furnaces and more particularly to a furnace for the burning of comminuted materials, debris and combustible waste substances, such for mstance, as shavings and sawdust.

It is one of the objects of the present invention to provide a furnace of large capacity for substantially continuously. burning macerated, comminuted and other more or less readily combustible material. It is a particular object of the invention to provide a furnace designed to provide for the substantially constant, rapid combustion of the material without the requirement of any forced draft and which will maintain combustion without a choking or packing and smothering of the burning substance.

It is, further, an object of the inventlon to provide an improved waste burning furnace constructed and arranged so that the material to be burned may be continuously 1ntroduced into the combustion chamber in which, it is an object of the invention, to provide for the introduction of air in such manner as to provide an ample supply for the thorough combustion of the waste or other material.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be made manifest in the following description of the preferred form of the invention, which is illustrated in the l drawings accompanying and forming part of the specification. It is to be understood that it is not intended to limit the invention to the embodiment shown by the said drawings and description, as variations may be adopted within the scope of the invention as set forth in the claims.

Figure 1 is a vertical central section through a preferred form of the furnace.

Fig. 2 is a detail showing a modification of the air conduit.

The invention consists of a tower-like combustion chamber preferably having a fire brick, circular wall of suitable diameter and height and provided with spark arrest ing means at the top and means for permitting the continuous introduction of material to be burned. An important feature of the invention is provision for the intro duction of air to facilitate combustion uniformly through the mass of material, accumulated in the bottom of the furnace, to be burned.

A practical embodiment of the invention consists of a vertical cylindrical fire brick wall 2 having an inner top spark arresting screen 3 of perforated metal or other foraminous material and which in turn is covered by an outer screen 4, all securely mounted and re-enforced by a suitable framework 5.

The lower portion of the cylindrical wall is provided at a suitable height above the bottom or foundation, with an annular series of downwardly inc-lined and radially arranged air conduits 6. These conduits may be provided in various manners and may in clude metallic tubes introduced in the brick wall and each provided with a damper 7, to control the indraft. In Fig. 2, a modified form of air conduit is shown in which the conduit is made in the form of an inwardly convergent or conical, nozzle-like tube 6.

The air feeding conduits are arranged so as to discharge air to support combustion, downwardly toward the center of the furnace.

The material to be burned is suitably conveyed to a feed hopper 8 which may be supported upon the upper portion of one side of the furnace wall and from which hopper extends a downwardly and inwardly inclined spout 9 passing through the furnace wall and arranged so as to project the mate rial into the furnace toward the center of the bottom, therefore insuring a substantially equal. distribution of the material upon the bottom of the furnace and in the zone of discharge of fresh air through the air conduits 6.

From the above it will'be seen that during the operation of the furnace, fresh air flows from the annular series of air inlets 6 substantially uniformly about the stack of material as it accumulates, the stack being burned away around its circumference just above the floor of the furnace in such a manner that the continuously, inwardly feeding material falls constantly into a burning zone, combustion. of which is efficiently maincreasing cross section disposed adjacent the bottom of the wall and inclined downwardly to discharge air against material on the bottom' of the furnace.

2. A waste burning furnace, comprising a tower-like wall defining a combustion chamber having an imperforate bottom wall upon which the material to be burned accumulates, said wall being provided adjacent said bottom with a plurality of downwardly inclined air inlet passages and being otherwise substantially imperforate.

In testimony whereof, I have hereunto set I my hand. arranged'air inlet passages of gradually de- CLAUDE REES; 

